Wellington's armies defeated Napoleon on the Iberian Peninsula but sea power exercised by the Royal Navy was required to install those land forces and to maintain them.
"The Role of the Royal Navy in the Napoleonic Wars After Trafalgar, 1805-1814,"
Naval War College Review: Vol. 32
, Article 8.
Available at: http://digital-commons.usnwc.edu/nwc-review/vol32/iss6/8